Chapter 4 — SENATE AND ASSEMBLY DISTRICTS

4.001 Legislative districts established. This state is divided into 33 senate districts, each composed of 3 assembly districts. Each senate district shall be entitled to elect one member of the senate. Each assembly district shall be entitled to elect one representative to the as…

4.002 County and municipal boundaries. In this chapter, reference to any county or municipality means that county or 4.45 4.46 4.47 4.48 4.49 4.50 4.51 4.52 4.53 4.54 4.55 4.56 4.57 4.58 4.59 4.60 4.61 4.62 4.63 4.64 4.65 4.66 4.67 4.68 4.69 4.70 4.71 4.72 4.73 4.74 4.75 4.76 4.7…

4.003 Description of boundaries. Wherever in this chapter territory is described by geographic boundaries, the following conventions are used: (1) Each bound continues to the intersection with the bound next named, or to the intersection with a straight-line extension of such bou…

4.006 Definitions. In this chapter: (1) “Block” has the meaning given in s. 5.02 (1q). (2) “Ward” means a ward prescribed by a municipality based upon municipal boundaries in effect on April 1 of the year of the federal decennial census in accordance with the most recent revision…

4.009 Senate districts. (1) FIRST SENATE DISTRICT. The combination of the 1st, 2nd, and 3rd assembly districts constitutes the first senate district. (2) SECOND SENATE DISTRICT. The combination of the 4th, 5th, and 6th assembly districts constitutes the 2nd senate district. (3) T…

4.01 First assembly district. All of the following territory constitutes the first assembly district: (1) WHOLE COUNTIES. Door and Kewaunee. May 22, 2026, are designated by NOTES. (Published 5-22-26) 3 Updated 23-24 Wis. Stats. (2) BROWN COUNTY. That part of Brown County consisti…

4.02 Second assembly district. All of the following territory constitutes the 2nd assembly district: (1) BROWN COUNTY. That part of Brown County consisting of all of the following: (a) The towns of Glenmore, Holland, Morrison, New Denmark, and Wrightstown. (b) That part of the to…

4.03 Third assembly district. All of the following territory constitutes the 3rd assembly district: (1) CALUMET COUNTY. That part of Calumet County consisting of all of the following: (a) The towns of Brillion, Brothertown, Charlestown, Chilton, Harrison, New Holstein, Rantoul, S…

4.04 Fourth assembly district. All of the following territory constitutes the 4th assembly district: (1) BROWN COUNTY. That part of Brown County consisting of all of the following: (a) The village of Suamico. (b) That part of the village of Howard located in the county. (c) That …

4.05 Fifth assembly district. All of the following territory constitutes the 5th assembly district: (1) BROWN COUNTY. That part of Brown County consisting of all of the following: May 22, 2026, are designated by NOTES. (Published 5-22-26) 4.05 Updated 23-24 Wis. Stats. LEGISLATIV…

4.06 Sixth assembly district. All of the following territory constitutes the 6th assembly district: (1) WHOLE COUNTY. Menominee. (2) BROWN COUNTY. That part of Brown County consisting of all of the following: (a) The town of Pittsfield. (b) That part of the village of Pulaski loc…

4.07 Seventh assembly district. All of the following territory in Milwaukee County constitutes the 7th assembly district: (1) That part of the city of Greenfield comprising U.S. census tract 19900, blocks 3014, 4000, 4001, 4011, 4012, 4014, 4018, and 4019; and tract 120202, block…

4.08 Eighth assembly district. All of the following territory in Milwaukee County constitutes the 8th assembly district: that part of the city of Milwaukee comprising U.S. census tract 15700, blocks 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 2000, 2001, 2002, 2003, 2004, 200…

4.09 Ninth assembly district. All of the following territory in Milwaukee County constitutes the 9th assembly district: (1) The village of West Milwaukee. (2) That part of the city of Milwaukee comprising U.S. census tract 12500, block 1033; and tract 13300, blocks 1018 and 1019;…

4.10 Tenth assembly district. All of the following territory in Milwaukee County constitutes the 10th assembly district: (1) The village of Shorewood. (2) The city of Glendale. (3) That part of the city of Milwaukee comprising U.S. census tract 2300, blocks 1006, 1011, 2005, 2006…

4.11 Eleventh assembly district. All of the following territory in Milwaukee County constitutes the 11th assembly district: that part of the city of Milwaukee comprising U.S. census tract 102, blocks 2016, 2017, 2018, 2020, 2021, 2022, 2023, 2024, 2025, 2026, 2027, 2028, and 2029…

4.12 Twelfth assembly district. All of the following territory in Milwaukee County constitutes the 12th assembly district: (1) That part of the village of Brown Deer comprising U.S. census tract 50101, blocks 1009, 1010, 1013, 1014, 1015, 1019, 1020, 1021, 1022, 4003, 4004, 4005,…

4.13 Thirteenth assembly district. All of the following territory constitutes the 13th assembly district: (1) MILWAUKEE COUNTY. That part of Milwaukee County consisting of that part of the city of Wauwatosa comprising U.S. census tract 90100, blocks 1000, 1001, 1002, 1003, 1004, …

4.14 Fourteenth assembly district. All of the following territory in Milwaukee County constitutes the 14th assembly district: (1) That part of the city of Milwaukee comprising U.S. census tract 12600, blocks 1007, 1008, 1009, 1010, 1011, 1014, 2000, 2001, 2002, 2003, 2004, 2005, …

4.15 Fifteenth assembly district. All of the following territory in Waukesha County constitutes the 15th assembly district: (1) The town of Brookfield. (2) The village of Pewaukee. (3) The city of Pewaukee. (4) That part of the city of Brookfield comprising U.S. census tract 2008…

4.16 Sixteenth assembly district. All of the following territory in Milwaukee County constitutes the 16th assembly district: that part of the city of Milwaukee comprising U.S. census tract 4700, blocks 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1009, 2000, 2001, 2002, …

4.17 Seventeenth assembly district. All of the following territory in Milwaukee County constitutes the 17th assembly district: that part of the city of Milwaukee comprising U.S. census tract 2400, blocks 2007 and 2008; and tract 2600, blocks 1000, 1001, 1002, 1003, 1004, 1005, 10…

4.18 Eighteenth assembly district. All of the following territory in Milwaukee County constitutes the 18th assembly district: (1) That part of the city of Milwaukee comprising U.S. census tract 3900, blocks 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1009, 1010, 1011, 1…

4.19 Nineteenth assembly district. All of the following territory in Milwaukee County constitutes the 19th assembly district: that part of the city of Milwaukee comprising U.S. census tract 7200, blocks 2000, 2001, 2002, 2003, and 2004; and tract 7300, blocks 1000, 1001, 1002, 10…

4.20 Twentieth assembly district. All of the following territory in Milwaukee County constitutes the 20th assembly district: (1) The cities of Cudahy, South Milwaukee, and St. Francis. (2) That part of the city of Milwaukee comprising U.S. census tract 18100, blocks 1014, 1015, 2…

4.21 Twenty-first assembly district. All of the following territory in Milwaukee County constitutes the 21st assembly district: (1) The city of Oak Creek. (2) That part of the city of Greenfield comprising U.S. census tract 120501, blocks 3000, 3001, 3002, 3003, 3004, 3005, 3006,…

4.22 Twenty-second assembly district. All of the following territory constitutes the 22nd assembly district: (1) OZAUKEE COUNTY. That part of Ozaukee County consisting of all of the following: (a) The towns of Cedarburg, Grafton, and Port Washington. (b) The village of Grafton. (…

4.23 Twenty-third assembly district. All of the following territory constitutes the 23rd assembly district: (1) MILWAUKEE COUNTY. That part of Milwaukee County consisting of all of the following: (a) The villages of Fox Point, River Hills, and Whitefish Bay. (b) That part of the …

4.24 Twenty-fourth assembly district. All of the following territory constitutes the 24th assembly district: May 22, 2026, are designated by NOTES. (Published 5-22-26) 15 Updated 23-24 Wis. Stats. (1) WASHINGTON COUNTY. That part of Washington County consisting of all of the foll…

4.25 Twenty-fifth assembly district. All of the following territory constitutes the 25th assembly district: (1) MANITOWOC COUNTY. That part of Manitowoc County consisting of all of the following: (a) The towns of Centerville, Manitowoc, Manitowoc Rapids, Meeme, Newton, and Two Ri…

4.26 Twenty-sixth assembly district. All of the following territory in Sheboygan County constitutes the 26th assembly district: (1) The town of Wilson. (2) That part of the town of Sheboygan comprising U.S. census tract 100, blocks 2004, 2005, 2009, and 2010; and tract 202, block…

4.27 Twenty-seventh assembly district. All of the following territory constitutes the 27th assembly district: (1) CALUMET COUNTY. That part of Calumet County consisting of that part of the city of Kiel located in the county. (2) FOND DU LAC COUNTY. That part of Fond du Lac County…

4.28 Twenty-eighth assembly district. All of the following territory constitutes the 28th assembly district: (1) DUNN COUNTY. That part of Dunn County consisting of all of the following: (a) The towns of Eau Galle, Lucas, Stanton, and Weston. (b) The villages of Downing and Knapp…

4.29 Twenty-ninth assembly district. All of the following territory constitutes the 29th assembly district: (1) WHOLE COUNTIES. Buffalo and Pepin. (2) PIERCE COUNTY. That part of Pierce County consisting of all of the following: (a) The towns of Diamond Bluff, El Paso, Ellsworth,…

4.30 Thirtieth assembly district. All of the following territory constitutes the 30th assembly district: (1) PIERCE COUNTY. That part of Pierce County consisting of all of the following: (a) The towns of Clifton and River Falls. (b) That part of the city of River Falls located in…

4.31 Thirty-first assembly district. All of the following territory constitutes the 31st assembly district: (1) ROCK COUNTY. That part of Rock County consisting of all of the following: (a) The towns of Bradford and Clinton. (b) The village of Clinton. (2) WALWORTH COUNTY. That p…

4.32 Thirty-second assembly district. All of the following territory constitutes the 32nd assembly district: (1) KENOSHA COUNTY. That part of Kenosha County consisting of all of the following: (a) The towns of Brighton, Paris, Randall, and Wheatland. (b) The villages of Bristol, …

4.33 Thirty-third assembly district. All of the following territory constitutes the 33rd assembly district: (1) RACINE COUNTY. That part of Racine County consisting of all of the following: (a) The towns of Burlington and Dover. (b) The villages of Rochester, Union Grove, and Yor…

4.34 Thirty-fourth assembly district. All of the following territory constitutes the 34th assembly district: (1) WHOLE COUNTY. Vilas. (2) ONEIDA COUNTY. That part of Oneida County consisting of all of the following: (a) The towns of Cassian, Crescent, Enterprise, Hazelhurst, Lake…

4.35 Thirty-fifth assembly district. All of the following territory constitutes the 35th assembly district: (1) WHOLE COUNTIES. Langlade and Lincoln. (2) MARATHON COUNTY. That part of Marathon County consisting of all of the following: (a) The towns of Berlin, Easton, Harrison, H…

4.36 Thirty-sixth assembly district. All of the following territory constitutes the 36th assembly district: (1) WHOLE COUNTIES. Florence, Forest, and Marinette. (2) OCONTO COUNTY. That part of Oconto County consisting of the towns of Bagley, Brazeau, Doty, Lakewood, Mountain, and…

4.37 Thirty-seventh assembly district. All of the following territory constitutes the 37th assembly district: (1) COLUMBIA COUNTY. That part of Columbia County consisting of that part of the village of Randolph located in the county. (2) DODGE COUNTY. That part of Dodge County co…

4.38 Thirty-eighth assembly district. All of the following territory constitutes the 38th assembly district: (1) DODGE COUNTY. That part of Dodge County consisting of all of the following: (a) The towns of Clyman, Emmet, Herman, Hubbard, Hustisford, Lowell, Oak Grove, and Shields…

4.39 Thirty-ninth assembly district. All of the following territory constitutes the 39th assembly district: (1) WHOLE COUNTIES. Green Lake and Marquette. (2) ADAMS COUNTY. That part of Adams County consisting of the towns of Jackson, Lincoln, and New Chester. (3) COLUMBIA COUNTY.…

4.40 Fortieth assembly district. All of the following territory constitutes the 40th assembly district: (1) COLUMBIA COUNTY. That part of Columbia County consisting of all of the following: (a) The towns of Caledonia, Fort Winnebago, Lewiston, Marcellon, Pacific, and Wyocena. (b)…

4.41 Forty-first assembly district. All of the following territory constitutes the 41st assembly district: (1) WHOLE COUNTY. Richland. (2) ADAMS COUNTY. That part of Adams County consisting of all of the following: (a) The towns of Dell Prairie, Easton, New Haven, and Springville…

4.42 Forty-second assembly district. All of the following territory constitutes the 42nd assembly district: May 22, 2026, are designated by NOTES. (Published 5-22-26) 19 Updated 23-24 Wis. Stats. (1) COLUMBIA COUNTY. That part of Columbia County consisting of all of the following…

4.43 Forty-third assembly district. All of the following territory constitutes the 43rd assembly district: (1) DANE COUNTY. That part of Dane County consisting of that part of the city of Edgerton located in the county. (2) JEFFERSON COUNTY. That part of Jefferson County consisti…

4.44 Forty-fourth assembly district. All of the following territory in Rock County constitutes the 44th assembly district: (1) The towns of Center, Janesville, La Prairie, Plymouth, Porter, and Rock. (2) The village of Footville. (3) That part of the city of Janesville comprising…

4.45 Forty-fifth assembly district. All of the following territory in Rock County constitutes the 45th assembly district: (1) The towns of Avon, Beloit, Magnolia, Newark, Spring Valley, Turtle, and Union. (2) The village of Orfordville. (3) The cities of Beloit and Evansville. Hi…